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VoxelArea = {
MinEdge = {x=1, y=1, z=1},
MaxEdge = {x=0, y=0, z=0},
ystride = 0,
zstride = 0,
}
function VoxelArea:new(o)
o = o or {}
setmetatable(o, self)
self.__index = self
local e = o:getExtent()
o.ystride = e.x
o.zstride = e.x * e.y
return o
end
function VoxelArea:getExtent()
return {
x = self.MaxEdge.x - self.MinEdge.x + 1,
y = self.MaxEdge.y - self.MinEdge.y + 1,
z = self.MaxEdge.z - self.MinEdge.z + 1,
}
end
function VoxelArea:getVolume()
local e = self:getExtent()
return e.x * e.y * e.z
end
function VoxelArea:index(x, y, z)
local i = (z - self.MinEdge.z) * self.zstride +
(y - self.MinEdge.y) * self.ystride +
(x - self.MinEdge.x) + 1
return math.floor(i)
end
function VoxelArea:indexp(p)
local i = (p.z - self.MinEdge.z) * self.zstride +
(p.y - self.MinEdge.y) * self.ystride +
(p.x - self.MinEdge.x) + 1
return math.floor(i)
end
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